At present, biogas production from livestock and poultry manure has developed rapidly. However, this is only in the area where the breeding industry is concentrated. The fecal raw materials are abundant and the biogas is developing rapidly. Farmers can obtain enough clean and cheap energy for daily life by using biogas. Due to the rapid development of large-scale breeding industry, the scattered breeding of farmers is gradually reduced. In some non centralized breeding areas, the reduction of livestock and poultry feces makes the supply of biogas raw materials in short supply, and the purchase of feces in the breeding areas is expensive and long.

Therefore, in many areas, rural biogas is stopped or abandoned due to insufficient raw materials. Although the phenomenon of straw burning has been reduced under the enforcement of relevant policies, the punishment measures of straw burning can only curb the waste of straw and environmental pollution to a certain extent. Strengthening the comprehensive utilization of straw can not only alleviate the problems of resource shortage and environmental pollution, but also increase the income of farmers to a certain extent and reduce the problem of rural labor surplus.

How to combine straw, which has a wide source, large storage capacity, convenient collection and storage, and low price, but can only be used as "ingredients" of anaerobic digestion with livestock and poultry manure, which is the traditional main raw material of anaerobic fermentation, to produce biogas, and gradually increase the proportion of straw and increase the proportion of straw ingredients, is the bottleneck that agricultural countries need to solve and overcome urgently. At the same time, the fermented biogas residue and biogas slurry are high-efficiency organic fertilizers, It is beneficial to develop organic fruits and vegetables and realize a virtuous cycle of rural economy.

Organic fertilizer drying equipment:

Drum dryer: it uses low temperature and large air volume for multi-stage continuous drying. Due to the melting and binding materials such as urea, it is also used in the production of inorganic fertilizer. The processing capacity of 7.5 kW motor per hour is 2.5 ~ 3.5 t.

Horizontal circular vibration dryer: the main body is composed of multi-layer annular orifice plates. Two synchronous vibration motors are cross arranged at the lower part of the main body. The upper part of the main body is equipped with a feed inlet, an air inlet and a discharge outlet. The two vibrating motors installed at the lower part of the main body synchronously rotate in reverse direction, so that the main body composed of the multi-layer annular orifice plate installed on the main body generates vertical vibration and torsional vibration, so that the materials entering from the feed port continuously jump from the upper layer to the lower layer along the horizontal annular orifice plate; The hot air passes through the orifice plates of each layer from the lower layer to the upper layer and passes through the material layer to achieve the purpose of uniform drying of materials.